[Bug target/65032] New: [5 Regression] ICE in reload_combine_note_use, at postreload.c:1556 on i686-linux-gnu

[Bug target/65032] New: [5 Regression] ICE in reload_combine_note_use, at postreload.c:1556 on i686-linux-gnu

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65032

            Bug ID: 65032
           Summary: [5 Regression] ICE in reload_combine_note_use, at
                    postreload.c:1556 on i686-linux-gnu
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org

Created attachment 34737
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34737&action=edit
preprocessed source

seen with 20150205 building firefox 36.0 on i686-linux-gnu, reproducible during
the build, however I can't reproduce this when just building this file.

In file included from
/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/obj-i686-linux-gnu/dom
/media/ogg/Unified_cpp_dom_media_ogg0.cpp:20:0:
/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/dom/media/ogg/OggReader.cpp:
In member funct
ion 'nsresult mozilla::OggReader::DecodeVorbis(ogg_packet*)':
/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/dom/media/ogg/OggReader.cpp:572:1:
internal 
compiler error: in reload_combine_note_use, at postreload.c:1556
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.

cd obj-i686-linux-gnu/dom/media/encoder
c++ -save-temps -o Unified_cpp_dom_media_encoder0.o -c
-I../../../dist/stl_wrappers -I../../../dist/system_wrappers -include
/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/config/gcc_hidden.h
-DOS_POSIX=1 -DOS_LINUX=1 -DSTATIC_EXPORTABLE_JS_API -DMOZILLA_INTERNAL_API
-DIMPL_LIBXUL -DMOZ_GLUE_IN_PROGRAM -DAB_CD=en-US -DNO_NSPR_10_SUPPORT
-I/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/dom/media/encoder -I.
-I/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/obj-i686-linux-gnu/ipc/ipdl/_ipdlheaders
-I/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/media/libyuv/include
-I/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/ipc/chromium/src
-I/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/ipc/chromium/src
-I/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/ipc/glue
-I../../../dist/include  
-I/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/obj-i686-linux-gnu/dist/include/nspr
-I/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/obj-i686-linux-gnu/dist/include/nss
      -fPIC   -DMOZILLA_CLIENT -include ../../../mozilla-config.h -MD -MP -MF
.deps/Unified_cpp_dom_media_encoder0.o.pp  -Wall -Wempty-body
-Woverloaded-virtual -Wsign-compare -Wwrite-strings -Wno-invalid-offsetof
-Wcast-align -fno-exceptions -fno-strict-aliasing -fno-rtti -ffunction-sections
-fdata-sections -fno-exceptions -fno-math-errno -std=gnu++0x -pthread -pipe 
-DNDEBUG -DTRIMMED -g -freorder-blocks -Os  -fomit-frame-pointer 
-I/frameworks/native/opengl/include -I/frameworks/native/include
-I/frameworks/av/include/media   
/scratch/packages/tmp/gcc5/firefox-36.0~b8+build1/obj-i686-linux-gnu/dom/media/encoder/Unified_cpp_dom_media_encoder0.cpp

[Bug target/65032] [5 Regression] ICE in reload_combine_note_use, at postreload.c:1556 on i686-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65032

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2015-02-12
                 CC|                            |jakub at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Can't reproduce.

[Bug target/65032] [5 Regression] ICE in reload_combine_note_use, at postreload.c:1556 on i686-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65032

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |5.0

[Bug target/65032] [5 Regression] ICE in reload_combine_note_use, at postreload.c:1556 on i686-linux-gnu

[pbrobinson at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65032

--- Comment #2 from pbrobinson at gmail dot com ---
Created attachment 34838
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34838&action=edit
preprocessed file from koji

this is from koji if it's of help or different from the other one

[Bug target/65032] [5 Regression] ICE in reload_combine_note_use, at postreload.c:1556 on i686-linux-gnu

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65032

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
                 CC|                            |trippels at gcc dot gnu.org

--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
I cannot reproduce the original issue.

For the testcase from comment 2:

markus@x4 tmp % g++ -c -w -m32 -Os -std=gnu++11 -fPIC -fstack-protector-strong
-fno-strict-aliasing -fno-exceptions  -fomit-frame-pointer testc.ii

In file included from
/builddir/build/BUILD/firefox-36.0/mozilla-release/objdir/dom/media/ogg/Unified_cpp_dom_media_ogg0.cpp:20:0:
/builddir/build/BUILD/firefox-36.0/mozilla-release/dom/media/ogg/OggReader.cpp:
In member function ‘nsresult mozilla::OggReader::DecodeVorbis(ogg_packet*)’:
/builddir/build/BUILD/firefox-36.0/mozilla-release/dom/media/ogg/OggReader.cpp:562:1:
internal compiler error: in reload_combine_note_use, at postreload.c:1556
0xbf4b3a reload_combine_note_use
        ../../gcc/gcc/postreload.c:1556
0xbf48bf reload_combine_note_use
        ../../gcc/gcc/postreload.c:1643
0xbf65f3 reload_combine
        ../../gcc/gcc/postreload.c:1423
0xbf76e0 reload_cse_regs
        ../../gcc/gcc/postreload.c:95
0xbf76e0 execute
        ../../gcc/gcc/postreload.c:2367
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions

Reducing...
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/65168] New: diagnostic: missing: reference cannot be bound to dereferenced null pointer
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ide168

            Bug ID: 65168
           Summary: diagnostic: missing: reference cannot be bound to
                    dereferenced null pointer
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jan.kratochvil at redhat dot com
            Target: x86_64-linux-gnu

int main() {
  int *p=static_cast<int *>(0),&r=*p;
  return !&r;
}

-Wall

g++ (GCC) 5.0.0 20150221 (experimental)
<nothing>

clang++ (clang-3.5.0-6.fc21.x86_64):
ref.C:3:12: warning: reference cannot be bound to dereferenced null pointer in
well-defined C++ code; pointer may be assumed to always convert to true
[-Wundefined-bool-conversion]

I have no idea if it can be miscompiled by either compiler.  Still I find
useful to be notified I write non-conforming C++ code.

[Bug target/65032] [5 Regression] ICE in reload_combine_note_use, at postreload.c:1556 on i686-linux-gnu

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65032

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vmakarov at gcc dot gnu.org

--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 tmp % cat testc.ii
#pragma GCC visibility push(hidden)
#pragma GCC visibility push(default)
extern "C" {
typedef int int64_t __attribute__ ((__mode__ (__DI__)));
}
enum class nsresult;
#pragma GCC visibility pop
class A
{
  float mRawPtr;

public:
  A (float *);
};
class B
{
public:
  B (int64_t, int, int);
};
typedef struct
{
  int channels;
} vorbis_info;
template <typename _Key> class C
{
public:
  typedef int size_type;
  size_type erase (_Key &);
};

template <typename _Key> class D
{
public:
  typedef _Key key_type;
  typedef C<key_type> _Rep_type;
  _Rep_type _M_t;
  typename _Rep_type::size_type
  erase (key_type p1)
  {
    return _M_t.erase (p1);
  }
};

class F
{
public:
  vorbis_info mInfo;
  D<int *> mVorbisPacketSamples;
  void ValidateVorbisPacketSamples (int *);
  int64_t Time (int64_t);
};
class G
{
  nsresult DecodeVorbis (int *);
  F *mVorbisState;
  int64_t mDecodedAudioFrames;
};
int fn1 (float ***);
void fn2 (int);
void
F::ValidateVorbisPacketSamples (int *p1)
{
  mVorbisPacketSamples.erase (p1);
}

nsresult
G::DecodeVorbis (int *p1)
{
  float **a;
  int b;
  long long c;
  while ((b = fn1 (&a)))
    {
      mVorbisState->ValidateVorbisPacketSamples (p1);
      A (new float);
      for (; mVorbisState->mInfo.channels;)
        {
        }
      int64_t d = mVorbisState->Time (c - b);
      (B (d, b, mVorbisState->mInfo.channels));
      mDecodedAudioFrames -= b;
      fn2 (b);
    }
}

markus@x4 tmp % g++ -c -m32 -Os -std=gnu++11 -fPIC -fstack-protector-strong
-fomit-frame-pointer testc.ii
testc.ii: In member function ‘nsresult G::DecodeVorbis(int*)’:
testc.ii:84:1: internal compiler error: in reload_combine_note_use, at
postreload.c:1556
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
markus@x4 tmp % /var/tmp/gcc_test/usr/local/bin/g++ -c -m32 -Os -std=gnu++11
-fPIC -fstack-protector-strong -fomit-frame-pointer testc.ii
testc.ii: In member function ‘nsresult G::DecodeVorbis(int*)’:
testc.ii:84:1: internal compiler error: in reload_combine_note_use, at
postreload.c:1556
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Subject: [Bug c++/65157] Unable to define a static template member function of a nested class as a friend of a sibling class.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ide157

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Clang accepts the code, EDG rejects it with:

"x.cc", line 16: error: nontype "A<T>::B::Create" is not a template
   friend void B::Create<U>();
                  ^

[Bug target/65032] [5 Regression] ICE in reload_combine_note_use, at postreload.c:1556 on i686-linux-gnu

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65032

Jeffrey A. Law <law at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |law at redhat dot com

--- Comment #7 from Jeffrey A. Law <law at redhat dot com> ---
I think that in the past we'd just shove in any old hard register and it worked
because we considered the SCRATCH with 'X' as not conflicting with anything.

It's probably not ideal, but I wonder if LRA could do that for us too. 
Alternately, maybe replace the scratch with const0_rtx.

[Bug target/65032] [5 Regression] ICE in reload_combine_note_use, at postreload.c:1556 on i686-linux-gnu

[vmakarov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65032

--- Comment #8 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Author: vmakarov
Date: Fri Feb 27 14:15:02 2015
New Revision: 221062

URL: https://gcc.gnu.org/viewcvs?rev=221062&root=gcc&view=rev
Log:
2015-02-27  Vladimir Makarov  <vmakarov@redhat.com>

    PR target/65032
    * lra-remat.c (update_scratch_ops): New.
    (do_remat): Call it.
    * lra.c (lra_register_new_scratch_op): New. Take code from ...
    (remove_scratches): ... here.
    * lra-int.h (lra_register_new_scratch_op): New prototype.

2015-02-27  Vladimir Makarov  <vmakarov@redhat.com>

    PR target/65032
    * g++.dg/pr65032.C: New.


Added:
    trunk/gcc/testsuite/g++.dg/pr65032.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/lra-int.h
    trunk/gcc/lra-remat.c
    trunk/gcc/lra.c
    trunk/gcc/testsuite/ChangeLog

[Bug target/65032] [5 Regression] ICE in reload_combine_note_use, at postreload.c:1556 on i686-linux-gnu

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65032

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #9 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Fixed. Thanks.